ATAR Notes: Forum

HSC Stuff => HSC Science Stuff => HSC Subjects + Help => HSC Chemistry => Topic started by: stareminem on October 11, 2019, 04:34:19 pm

Title: Gibbs free energy signs
Post by: stareminem on October 11, 2019, 04:34:19 pm

The notes say that when ΔG is positive, the reaction is spontaneous, and non- spontaneous when negative. Shouldn’t it be the other way around?

Title: Re: Gibbs free energy signs
Post by: Rom_Dog on October 12, 2019, 11:29:12 am

Quote from: stareminem on October 11, 2019, 04:34:19 pm

The notes say that when ΔG is positive, the reaction is spontaneous, and non- spontaneous when negative. Shouldn’t it be the other way around?

Hey!
When the the coefficient of Gibbs free energy is negative, the reaction is spontaneous. For some reactions however, the spontaneity of the reaction is also dependent on the temperature.
Hope this helps! :)